function setSubCookie( cookieName, name, value ) {
	var allCookies = unescape(getCookie(cookieName)).split("|");

	// remove subcookie
	for( i=0; i<allCookies.length; i++ ) {
		var subcookie = allCookies[i].split("=");
		if( subcookie[0]==name ) {
			allCookies.splice(i,1);
			//break;
		}
	}
	
	allCookies.splice(0,0, name + '=' + escape(value) );
	setCookie(cookieName, escape(allCookies.join("|")));
}

function getSubCookie( cookieName, name ) {
	
	// get old cookie
	var allCookies = unescape(getCookie(cookieName)).split("|");
	for( i=0; i<allCookies.length; i++ ) {
		var subcookie = allCookies[i].split("=");
		if( subcookie[0]==name ) {
			return unescape(subcookie[1]);
		} 
	}
	return null;
}

/**
 * Sets a Cookie with the given name and value.
 *
 * name       Name of the cookie
 * value      Value of the cookie
 * [expires]  Expiration date of the cookie (default: one year)
 * [path]     Path where the cookie is valid (default: /)
 * [domain]   Domain where the cookie is valid
 *              (default: domain of calling document)
 * [secure]   Boolean value indicating if the cookie transmission requires a
 *              secure transmission
 */
function setCookie(name, value, expires, path, domain, secure) {
	oneYear = new Date();
	oneYear.setFullYear(oneYear.getFullYear()+1,oneYear.getMonth(), oneYear.getDate());
	
	var cookieString = name + "=" + escape(value) + 
        "; expires=" + ((expires) ?  expires.toGMTString() : oneYear.toGMTString()) +
        "; path=" + ((path) ? path : "/") +
        ((domain) ? "; domain=" + domain : "") +
        ((secure) ? "; secure" : "");
	
    document.cookie = cookieString;
}

/**
 * Gets the value of the specified cookie.
 *
 * name  Name of the desired cookie.
 *
 * Returns a string containing value of specified cookie,
 *   or "" if cookie does not exist.
 */
function getCookie(name) {
    var dc = document.cookie;
    var prefix = name + "=";
    var begin = dc.indexOf("; " + prefix);
    if (begin == -1) {
        begin = dc.indexOf(prefix);
        if (begin != 0) return null;
    }
    else {
        begin += 2;
    }
    var end = document.cookie.indexOf(";", begin);
    if (end == -1) {
        end = dc.length;
    }

	return unescape(dc.substring(begin + prefix.length, end));
}

/**
 * Deletes the specified cookie.
 *
 * name      name of the cookie
 * [path]    path of the cookie (must be same as path used to create cookie)
 * [domain]  domain of the cookie (must be same as domain used to create cookie)
 */
function deleteCookie(name, path, domain) {
    if (getCookie(name)) {
		document.cookie = name + "=" + 
			((path) ? "; path=" + path : "") +
			((domain) ? "; domain=" + domain : "") +
			"; expires=Thu, 01-Jan-70 00:00:01 GMT";
    }
}